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Wikipedia

The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a mouse click or by tapping the screen in a web browser. Development of HTTP was initiated by Tim Berners-Lee at CERN in 1989 and summarized in a simple document describing the behavior of a client and a server using the first HTTP protocol version that was named 0.9.That first version of HTTP protocol soon evolved into a more elaborated version that was the first draft toward a far future version 1.0.Development of early HTTP Requests for Comments (RFCs) started a few years later and it was a coordinated effort by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), with work later moving to the IETF. HTTP/1 was finalized and fully documented (as version 1.0) in 1996. It evolved (as version 1.1) in 1997 and then its specifications were updated in 1999, 2014, and 2022.Its secure variant named HTTPS is used by more than 80% of websites.HTTP/2, published in 2015, provides a more efficient expression of HTTP's semantics "on the wire". It is now used by 41% of websites and supported by almost all web browsers (over 97% of users). It is also supported by major web servers over Transport Layer Security (TLS) using an